Lovely plant Drc726. When I was a child - many years ago!!! my father had this on his rockery and it was known as Snow -on-the-mountain. I remember picking a bunch of this occasionly to take into my teacher. Funny how little things like this stick in your mind isn't it?

I am so glad you said that Linsuffolk as I grew up in Norfolk and I remember it as Snow on the Mountain all over my dads rockery. But on the internet snow on the mountain is quite a different plant? So perhaps in East Anglia its known by gardeners as S on the M?